Self-contradictory articles from January 2015

frame|A sample of Kyrie|Kýrie Eléison XI (Orbis Factor) from the Liber Usualis. Listen to it interpreted. A neume (; sometimes spelled neum) is the basic element of Western and some Eastern systems of musical notation prior to the invention of five-line staff notation.

contract stipulating that the seller will pay to the buyer the difference between the current value of an asset and its value at contract time